npm install 报错（npm ERR! errno -4048，Error: EPERM: operation not permitted,）解决方法

npm ERR! path E:\SouthernPowerGridProject\web_project\AutoOPS\autoops\node_modules\fsevents\node_modules\dashdash\node_modules
npm ERR! code EPERM
npm ERR! errno -4048
npm ERR! syscall scandir
npm ERR! Error: EPERM: operation not permitted, scandir 'E:\SouthernPowerGridProject\web_project\AutoOPS\autoops\node_modules\fsevents\node_modules\dashdash\node_modules'
npm ERR!  { Error: EPERM: operation not permitted, scandir 'E:\SouthernPowerGridProject\web_project\AutoOPS\autoops\node_modules\fsevents\node_modules\dashdash\node_modules'
npm ERR!   stack: 'Error: EPERM: operation not permitted, scandir \'E:\\SouthernPowerGridProject\\web_project\\AutoOPS\\autoops\\node_modules\\fsevents\\node_modules\\dashdash\\node_modules\'',
npm ERR!   errno: -4048,
npm ERR!   code: 'EPERM',
npm ERR!   syscall: 'scandir',
npm ERR!   path: 'E:\\SouthernPowerGridProject\\web_project\\AutoOPS\\autoops\\node_modules\\fsevents\\node_modules\\dashdash\\node_modules' }
npm ERR!
npm ERR! Please try running this command again as root/Administrator.

npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\ThinkT420\AppData\Roaming\npm-cache\_logs\2017-10-30T06_50_38_610Z-debug.log

之前有时报这个，以为还真是权限不够，感觉有点奇怪，用管理员权限执行，有时还真有用，不过后面查了下，时缓存的问题，清理下缓存就行，不用管理员权限。

方法1、

需要删除npmrc文件。

强调：不是nodejs安装目录npm模块下的那个npmrc文件

而是在C:\Users\{账户}\下的.npmrc文件..

方法2、

或者直接用命令清理就行，控制台输入：

npm cache clean --force

added 114 packages in 42.369s
E:\SouthernPowerGridProject\web_project\AutoOPS\autoops>npm cache clean --force
npm WARN using --force I sure hope you know what you are doing.

E:\SouthernPowerGridProject\web_project\AutoOPS\autoops>npm install
npm notice created a lockfile as package-lock.json. You should commit this file.
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.1.2 (node_modules\fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.1.2: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})

added 114 packages in 42.369s

成功了